Search found 198 matches

by OB SeaDAS - xuanyang02
Wed Dec 15, 2021 11:52 am America/New_York
Forum: Questions/Comments
Question: How to get the rhos_478 in Seadas?
Replies: 2

Re: How to get the rhos_478 in Seadas?

It’s a calibration issue. We don’t have gains for L7 (so unity values are used). As a result, this scene has negative rhos. We do not provide the calibration adjustments that would be necessary to get valid retrievals, but you can see if this paper helps: https://doi.org/10.3390/rs10091337 Attached ...
by OB SeaDAS - xuanyang02
Mon Dec 13, 2021 10:03 am America/New_York
Forum: Questions/Comments
Question: How do I define the area of interest scope and set the resolution of the output
Replies: 1

Re: How do I define the area of interest scope and set the resolution of the output

Are you trying to do l2gen on Sentinel 2 data?

With l2gen, you can define the area of interest in the processing tab, but I don't think you can set resolution for data other than modis.
https://seadas.gsfc.nasa.gov/help-8.0.0 ... L2gen.html
by OB SeaDAS - xuanyang02
Fri Dec 10, 2021 10:29 am America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

Here is direct access to MODIS AQUA Data --https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/ or you can use the Level 1& 2 Browser -- https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=amod If you are not familiar with SeaDAS or NASA OB.DACC, here is an intro -- https://seadas.gsfc.na...
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 4:12 pm America/New_York
Forum: Questions/Comments
Question: Error processing from MODIS L1 to L2 in SEADAS
Replies: 1

Re: Error processing from MODIS L1 to L2 in SEADAS

In SeaDAS 7, modis_GEO.py and getanc.py are in $OCSSWROOT/scripts, and anc_utils.py is in $OCSSWROOT/scripts/modules. In SeaDAS 8, modis_GEO and getanc are in $OCSSWROOT/bin, anc_utils.py is in $OCSSWROOT/bin/seadasutils. It seems to me you are running modis_GEO.py in SeaDAS 7 on command line. I won...
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 1:11 pm America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

In SeaDAS l2gen GUI, click Processing Option tab, you can toggle "atmocor" on -- https://seadas.gsfc.nasa.gov/help-8.1.0 ... PTIONS_TAB

Here is more regarding aer_opt: https://oceancolor.gsfc.nasa.gov/forum/ ... l?tid=7026
by OB SeaDAS - xuanyang02
Thu Dec 09, 2021 11:04 am America/New_York
Forum: Questions/Comments
Question: Deriving chlorophyll from MODIS AQUA L1 data is Advisable
Replies: 6

Re: Deriving chlorophyll from MODIS AQUA L1 data is Advisable

Chlor_a is available in L2 data - https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/L2/ You can also use SeaDAS to process MODIS AQUA L1A data to L2: modis_GEO: L1A -> geo https://seadas.gsfc.nasa.gov/help-8.1.0/processors/ProcessModis_GEO.html ModiS_L1B: L1A + geo - > L1B https://seadas.g...
by OB SeaDAS - xuanyang02
Tue Dec 07, 2021 11:27 am America/New_York
Forum: Questions/Comments
Question: OCSSW: Remote server is down
Replies: 11

Re: OCSSW: Remote server is down

OB SeaDAS - xuanyang02 wrote: Mon Nov 15, 2021 3:48 pm America/New_York To process SeaDAS OCSSW in Windows, you need to do client-server configuration first. Please follow the instructions in https://seadas.gsfc.nasa.gov/client_server/ to
1. Installing an OCSSW Server
2. Configure the Virtual Machine
3. Deploy the OCSSW Web Services Package
by OB SeaDAS - xuanyang02
Mon Nov 22, 2021 10:37 am America/New_York
Forum: Questions/Comments
Question: L3 Browser extract data error
Replies: 10

Re: L3 Browser extract data error

You should have AQUA_MODIS.20160101_20161231.L3b.YR.SST.x.nc AQUA_MODIS.20170101_20171231.L3b.YR.SST.x.nc AQUA_MODIS.20180101_20181231.L3b.YR.SST.x.nc AQUA_MODIS.20190101_20191231.L3b.YR.SST.x.nc in your SSTfiles rather than 1 AQUA_MODIS.20160101_20161231.L3b.YR.SST.x.nc 2 AQUA_MODIS.20170101_201712...
by OB SeaDAS - xuanyang02
Mon Nov 22, 2021 9:55 am America/New_York
Forum: Questions/Comments
Question: L3 Browser extract data error
Replies: 10

Re: L3 Browser extract data error

Select input_files.txt as your ifile in l3bin GUI. See the attached image. Screen Shot 2021-11-22 at 9.46.31 AM.png The content of your input_files.txt should be: AQUA_MODIS.20160101_20161231.L3b.YR.SST.nc AQUA_MODIS.20170101_20171231.L3b.YR.SST.nc AQUA_MODIS.20180101_20181231.L3b.YR.SST.nc AQUA_MOD...
by OB SeaDAS - xuanyang02
Mon Nov 22, 2021 9:21 am America/New_York
Forum: Questions/Comments
Question: Why does hicO's Lt(top of atmosphere) data exceed 1?
Replies: 9

Re: Why does hicO's Lt(top of atmosphere) data exceed 1?

The unit of Lt in HICO L1B is W/m^2/micrometer/sr.